Increase arbitrary MAX_AXIS limit

[kmpeters]

MAX_AXIS was last increased (from 10 to 32) twenty years ago:

141daff

Controllers that support 64 axes are increasingly common. MAX_AXIS should probably be increase to 128.

MAX_AXIS only appears to be used in one location:

motor/motorApp/MotorSrc/motordrvCom.h

Line 178 in 8166246

struct mess_info motor_info[MAX_AXIS];

[MarkRivers]

And the one place it is used is only for Model 1 drivers which should never be used for new drivers.

[kmpeters]

@MarkRivers, are you aware of any 32-axis limitations for model-3 drivers? I didn't find any in the asyn motor support or my brief search of the asyn module.

Axilion has reported a 32-axis limitation with motorAcsMotion, but the driver-imposed maximun number of axes has been 64 for the last four years.

[MarkRivers]

I don’t know of any, but I have searched.